protandry, where it morphs into a female in order to reproduce. It does this by laying pale pink eggs on the underside of its float, where they stay attached until they hatch later on in their development (Wilson and Wilson, 1956, 302). Gallery References Laursen, D. 1953. The genus Ianthina: A monograph. Dana Report 38: 1-40, pl. 1. Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196-219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch. Crnčević M, Cetinić AB. 2016. The violet snail Janthina janthina (Linnaeus, 1578) (Mollusca: Gastropoda) is around the Croatian Adriatic island of Lokrum again. Natura Croatica, 25(2):327-330. Deudero S, Pinnegar J, Polunin N. 2002. Insights into fish host-parasite trophic relationships revealed by stable isotope analysis. Diseases of Aquatic Organisms. 52:77-86. F. Betti, G. Bavestrello, M. Bo, M. Coppari, F. Enrichetti, M. Manuele & R. Cattaneo-Vietti (2017) Exceptional strandings of the purple snail Janthina pallida Thompson, 1840 (Gastropoda: Epitoniidae) and first record of an alien goose barnacle along the Ligurian coast (western Mediterranean Sea), The European Zoological Journal, 84:1,488-495, DOI: 10.1080/24750263.2017.1379562 Teker S, Gökoğlu M , Julian D. 2017. First Record of Janthina globosa Swainson, 1822 (Mollusca, Gastropoda) and Prostheceraeus giesbrechtii Lang, 1884 (Platyhelminthes) in the Gulf of Antalya. Natural and Engineering Sciences, 2(1): 6-10. The Author, 2017. Journal compilation © Australian Museum, Sydney, 2017 Records of the Australian Museum (2017) Vol. 69, issue number 3, pp. 119–222. ISSN 0067-1975 (print), ISSN 2201-4349 (online) https://doi.org/10.3853/j.2201-4349.69.2017.1666 Wilson, D. P., and M. A. Wilson. 1956. A contribution to the biology of Ianthina janthina (L.). Journal of the Marine Biological Association of the United Kingdom 35: 291–305. https://doi.org/10.1017/S0025315400010146 External links Gary Rosenberg's Malacolog 4.1.1 info on this species Swainson, W. (1820-1823). Zoological Illustrations, or, original figures and descriptions of new, rare, or interesting animals, selected chiefly from the classes of ornithology, entomology, and conchology, and arranged on the principles of Cuvier and other modern zoologists. London: Baldwin, Cradock & Joe; Strand: W. Wood. (Vol. 1-3) Menke, K. T. (1828). Synopsis methodica molluscorum generum omnium et specierum earum, quae in Museo Menkeano adservantur; cum synonymia critica et novarum specierum diagnosibus. XII + 91 pp Blainville H.M.D. de. (1822). Janthine, Janthina. pp. 148-155, in: Dictonnaire des Sciences Naturelles (F. Cuvier, ed.), vol. 24. Levrault, Strasbourg & Le Normant, Paris Monterosato T. A. (di)